Pipe-forming machine



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S. HARTLEY. PIPE FORMING MACHINE.

(No Model.)

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WITNESSES:

r Simeoreflantle (No Model.) 7 Sheets-Sheet 2. S HARTLEY PIPE FORMING MACHINE.

No. 449,412. Patented Mar. 31,1891.

,nme o 14, H urn-1 6119 (No Model.) 7 Sheets-Sheet 3.

S. HARTLEY.

PIPE FORMING MACHINE.

No. 449,412. Patented Mar. 31, 1891.

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7 Sheets-Sheet 4.

Patented Mar. 31, 1891.

INVENTUB Jytbe ATT'Yi (No Model.)

S. HARTLEY. PIPE FORMING MACHINE.

WITNESSES 1 OkJMmWyu (No Model.) 7 SheetsSheet 5.

S. HARTLEY.

PIPE FORMING MACHINE.

No. 449,412. Patented Mar. 31,1891.

WITNESSES: INVENTUR':

(No Model.) 7 sheets sheet 6.

s. HARTLEY.

PIPE FORMING MACHINE. No. 449,412. Patented Mar. 31, 1891. v

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(No Model.) 7 Sheets-Sheath 7. S HARTLEY PIPE FORMING MACHINE.

414449412. Patented Mar. 31,1891.

INVENTOH'.

,Sjime on 1100172513 BY M CZ ATT'Y.

\ UNITED STATES ATENT OFFICE.

SIMEON HARTLEY, OF NEYVARK, NE\V JERSEY, ASSIGNOR TO THE NEVARK SHEET METAL XVARE COMPANY, OF NETV JERSEY.

PIPE-FORMING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 449,412, dated March 31, 1891.

' Application filedDecemher 20, 1890. Serial No. 375,323. (No model.)

to in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The purpose of this invention is to provide a machine by means of which a piece of sheet metal provided on its longitudinal edges with the proper standing edges, when fed into said machine by the workman, is formed into a leader-pipe upon a mandrel adapted to be rotated in journals in the frame-supports of the machine, and the machine being provided with means for upsetting and interlocking the edges of the metal sheet, which can be readily and accurately done, producing in one operation a piece of sheet-metal pipe in which the seam has been formed and closed down without the use of solder, and, furthern'iore, a leadenpipe is the result which is of much greater length than such pipes as heretofore made.

The invention is further designed to secure a perfect union of the standing edges of the sheet metal, and also to provide a machine 3 5 which can be readilyand quickly adjusted to turn out leader-pipes of different sizes of diameters.

The invention is therefore further designed to provide a device or devices for regulating the sizes of the clamping or holding jaws and the formers, so that they will conform to the required size of the mandrel in making different-sized leader-pipes.

The form of construction selected to embody the invention in an operative machine is illustrated in the accompanying seven sheets of drawings, in which- Figure 1 is a side elevation of my leaderforming machine. Fig. 2 is a horizontal section taken on line .2 in Fig.1, illustrating one form of mandrel considerably enlarged and its forming and clamping or holding jaws or arms. On Sheet 3, Fig. 3 is an end view of the left end of the machine; and Fig. 4: is a side View of said end shown in Fig. 3, certain parts thereon being represented in vertical section. 011 Sheets 4 and 5, Figs. 5 and 6 are vertical sections taken through linesa: and y, respectively, in Fig. 1. On Sheet 6, Figs. 7, 8, 9, and 10 are views illustrating the sev- 6o eral operations or steps in the process of forming the pipe and in the bending down and interlocking of the seam. On Sheet 7, Figs. 11 and 12 are a front and side elevation, respectively, of the device for firmly closing down the seam after the ends of the sheet metal have been interlocked, said device being geared in engagement with a rack in line with and directly above the mandrel and the scam in the pipe which has been formed upon said mandrel. In Figs. 13 and 14 are illustrated adjusting devices adapted to be attached to the formers and to the clampingjaws when a mandrel of smaller diameter is used than that shown in Figs. 1, 2, ct seq. Fig. 15 is a front View of a part of the formingbar used in connection with the construction illustrated in Fig. 141.

In the above-described views similarletters of reference are employed to indicate corre- 8o spending parts in eaclr of the several figures.

The construction and operation of the lead er-pipe-forming machine will now be described, in order that a more complete understanding may be had of the relation of the several improvements shown in the drawings.

The machine consists of two main framesupports A and A, which are preferably formed as shown in Figs. 3, at, 5, and 6, and upon which are arranged and secured the heads a and a, each of which is provided with a journal-bearing a and o respectively, said bearings being open at the top and having placed therein a mandrel B, which is provided along its length on one side with a steel plate I), secured to said mandrel by means of screws or pins, and which plate is made to project upwardly at its forward end 13, forming a longitudinal recess or slot I) along the entire length of the mandrel between the latter IOO and said plate and between the frame-s11 pports A and A, as will be evident from Figs. 3, 5, 6, 7, 8, 9, and 10. I

The mandrel B is loosely arranged in its bearings, and on one end of the machine it projects considerably beyond the bearing in the frame-support- A, being provided with an operating lever or handle Z7 and a locking or holding device 0, which is attached to the frame A, and said end of the mandrel also passing through a frame or gallows A the purpose of which will' be described hereinafter. Upon each of the heads av and a are secured the supports a and a respectively, each of which has in its upper end a screw a, provided with the nuts a and a for securing in position under the frame-supports A and A the cross-bar A The lower ends of the frames A and A are secured by a tie-boltA. This arrangement constitutes the main frame of the machine. From Fig. 2 it will be evident that the mandrel is maintained in the proper position in its bearings by means of collars a and a and upon the mandrel on the outside of said collar a is arranged the looking or holding device 0, which consists of a wheel 0, secured to the mandrel in any manner and provided with a recess 0, which, when the mandrehis in its normal position, stands upwardly in a vertical plane passing through the central longitudinal axis of the mandrel. On one side of the frame A is secured a plate 0 provided with ears or lugs 0 between which is pivoted a handle 0", as will be noticed from Figs. 1, 2, and 3. Said handle has on its under side a downwardly-projecting lug 0 which drops into the recess 0' in the wheel 0, and thereby holds the mandrel in its normal position, so that the edge I) of the plate I), secured to said mandrel, is in the same vertical plane, passing through the central longitudinal axis of the n|andrel,or nearly so. In this same vertical plane, directly beneath the mandrel, is arranged a shaft D, upon which are secured formersEand two sets of clamping or holding arms, which, however, are loosely arranged on said shaft, and which are employed in the several steps during the process of forming the sheet metal into a leader-pipe, &c. Said shaft D,as will be seen more especially from Fig. l, is arranged in the bearings a and a in their respective supports A and A, and is secured therein by means of suitable collars cl. On the other end of said shaft is arranged an operating lever or handle (7., adapted to slide against the flat surface (1 of a curved plate (1 ad justabl y secured to a support d", attached by means of a foot d on the frame A. Said plate d as will be seen from Fig. 4:, is secured by means of bolts d and d in slots (1 and d in the support. The top of this support is bent at a right angle, and so is the plate (Z and a stud (Z centered in the top of said bent portion of the support and working through a threaded perforation in the bent portion of the plate d serves, when turned, to cause said plate to be adjusted upon its supports, the bolts (Z and d sliding within the slots d and d The plate (1 is also provided with a hole (1, as will be seen from Fig. 3, and when the shaft D has been turned by means of the lever. d the hooked end (Z of the arm (Z slides against the surface d until it drops into the hole d, and the shaft is thus locked in the proper position. Said arm (Z is pivoted between lugs cl on the lever (Z, and a spring 01" causes the opposite end'd, which passes through a perfora tion in the lever d, to be cor stantly forced against the surface (7?, as will be evident from Fig. 4.

Of course it will be understood that when mandrels of different diameters are used the hole (Z is adjusted accordingly by means of the stud cl The operation of the machine in forming leader-pipes from sheet metal is as follows: A piece of sheet metal 9 of the proper width, and which has been previously provided with the projections g and 9 is placed over the edge 1) upon the mandrel B, so that the edge g is caught under the plate I) in the recess 11 as is clearly illustrated in Fig. 7. As shown in saidtigure, the formers E are then brought into their proper positions. The construction of said formers is illustrated more especially in Figs. 1 and 2, and consists of any desirable number of peculiarly-shaped arms 6, which are slipped upon the shaft D and keyed thereon in certain positions, as will be noticed from said figures. Said arms 6 are arranged upon their shaft D so that theyproject upwardly, and are provided with a semicircular port-ion e, which is of a slightlyincreased diameter over that of the mandrel B. As will be seen more especially from Figs. 3 and 5, said arms care provided with straight portions 6 to which, as will be seen from said figures, and also from Figs. 1 and 2, is secured an adjustable depressor-bar H, the use and operation of which will be described farther on. Now when the former-arms e have been brought into the position indicated in Fig.7, by turning the shaft D by means of its handle or lever d and then looking it by the forcing of the end (Z on the arm (Z into the hole (Z on the curved plate d the pivoted handle 0 on the locking device 0 is thrown back, releasing the tooth or projection c from engagement with the recess '0 in the wheel 0. The mandrel B is then turned by means of its handle b making one complete turn, the upper edge of the sheet metal sliding against the lower edge h of the depressor-bar H and in the circular portions 6 of the former-arms, and during the several positions as the sheet metal is being wound around the mandrel the clamping-arms F are forced up against the metal sheet, and when the sheet metal has been still further wound around the mandrel, assuming the position shown in Fig. 8, then a second set of clamping-arms F on the opposite side of the machine are brought to bear against the sheet metal. holding arms F, as will be seen from Figs. 1 and 6, consist of a number of arms f, loosely arranged by means of sleeves f on the shaft D. They are provided with oppositely-projecting portions f and f said portions f being connected by a straight bar f and operated by a hand-lever f whereby the portions f provided with the recesses f, can be firmly held against the metal sheet during the process of forming the leader-pipe. The clamping-arms F are similar in their construction and action to the arms F, and they consist of the arms f also loosely arranged on the shaft- D by means of the sleeves f. A bar f connects the arms f which can be operated by the levers f at either end of the bar f. Said lovers are in close contact with the inner sides 5 of the standards I, and, as is clearly shown in Fig. 3, bear against a pin t", which limits the downward movement of said levers. Said standards are made adjustable by providing the main portion with a bolt 4?, which extends through a slot i in the plate i whereby said plate is made adjustable and can be raised or lowered when desired. Now when the sheet metal has been formed, as shown in Fig. 8, it will be noticed that the end of the sheet projects up beyond the lower edge h of the depressor-bar l'I. Said bar is secured to the former-arms c by means of screws or bolts h or other means arranged in the inclined slots h as will be seen from Figs. 1, 2, and 3. A post it is secured to a short bar 7%, (see Fig. 1,) connecting two of the arms 6, and upon the upper end of said post I have arranged a pivoted lever J, provided at one end with a handle portion j and at the other end with a slotted eye j, which is arranged in such a manner that it almost rests upon the upper surface 705 of the depressor-bar II, and apin it on said bar projects through the slot in the lever J, as willbe evidentfrom said Figs. 1 and 2. The next step in the operation of forming the leader-pipe is the forcing down of the end 9' of the metal sheet so that it will assume the position indicated in Fig. 9. This is accomplished by turning the lever J toward the operator, which causes the slotted portion j to slide on the pin h, forcing the depressorbar it down along the slots 71 as will be clearly understood from Fig. 2. At the same time the lower edge h of the bar is brought down and bears tightly against the end of the sheet metal, bringing said end of the metal down upon the mandrel B, and the next step in the operation, as will be seen from Fig. 10, is to turn the mandrel in the opposite direction, so that the, end g of the sheet metal will be withdrawn from its holding engagement with the longitudinal slot or recess b in the mandrel. By slightly loosening the clamping-arms F said end g of the sheet metal will spring up far enough to allow the end 9 to be forced under the same, by tightly forcing the formers E and the depressonbar ll up Said clamping or against the mandrel, whereby said ends g and 9 will interlock, as clearly shownin said Fig. 10. Thishavingbeenaccomplished,theformers and clamping arms or jaws are released and thrown off, and the joint or scam in the pipe just formed is tightly closed down by means of the bending-down device. (Illustrated in detail in Figs. 11 and 12.)

To more fully understand the construction and operation of this bending-down mechanism, I will now describe the construction of the same and its arrangement uponthe crossbar A of the machine and the manner in which the same is operated to move from one end of said bar to the other end. Said barA as will be noticed fromthe cross-section of the same in Fig. 12, is provided with two oppositely-arranged chamfered projections, forming ways or guides e and a, respectively, against the under sides a and the chamfered sides a of which I have arranged the small plates Z and Z of the bending-down device. Said plates are secured in position on these ways or guides by means of top pieces P, which are secured to the plates Z and l by bolts or screws Z and the ends Z" thereof project over upon the upper surfaces of the guides, whereby the device can be caused to move upon said ways, as will be seen. One of said pieces l is provided with a bearing Z in which is arranged a spindle Z, provided with a pinion m and a hand-wheel n. Said pinion meshes with a gear-wheel m on a spindle or shaftm secured in the bearings Z and Z on the plates Z and Z, respectively. As will be seen more particularly from Figs. 11 and 12, said plates land Z project down on opposite sides of the rack a, secured on the under side at its ends to the cross-bar A bybolts a. Apinion m on the spindle m meshes with the teeth on this rack. On opposite sides of this pinion m are arranged the crank-arms m and m, provided at their lower ends with a bolt or pin 0, on which is ar ranged a wheel 0, provided around its circumference with the groove 0 From one of said arms, as 111;, extends a handle which is normally held in its raised position by a spring 19, attached to a postp on the plate 1. Said lever and its spring tend to throw the wheel 0 normally out of the way of the IIO movement of the mandrel B. When, however, the joint or seam has been formed and the formers and clamping-arms have been thrown back, then lever or handle 19 is pressed down by the operator, so that the groove 0 in the wheel 0 is in close contact with the open seam 011 the pipe just formed. By bearing down on the lever 19 and turning the hand-wheel n pinioirm operates the gear mi and its spindle m causing the pinion m to engage with the teeth of the rack on the crossbar A the whole device thus being caused to move along the guides or ways thereon, while the wheel 0' revolves along the scam in the pipe upon the mandrel and tightly closes down the seam therein. hen this has been done, said bending-down device is returned to its former position, as indicated in Fig. 1. The finished pipe is now ready to be removed from the mandrel. In order to do this, the end B of the mandrel is raised from its hearing a lifting the mandrel on the bearing a as a fulcrum. This lowers the opposite end B of the mandrel within the standard or gallows A and by placing an ordinary wedge-shaped wooden block upon said end of the mandrel and forcing it under the pin A in said gallows A the mandrel is retained in an inclined raised position and the completed leader-pipe can be drawn therefrom at the raised end B, as will be understood.

In order to prevent any sagging of the shaft B when used in machines to make very long pieces of sheet-metal pipes, I have arranged beneath the mandrel, as shown in Fig. 1, a

support R, which can be adjusted to the proper height to keep the shaft perfectly level. It consists, mainly, of a supporting-plate r and a rod 1", which screws into a base r and is provided with a nut r for adjusting the same when necessary.

The construction in the machine described in the above is for producing leader-pipes of the largest diameter now in use but by changing the proportions of the several parts of the machine it will be practical for forming pipes of any diameters. The same machine, however, can be employed for making pipes of smaller diameters by using smaller mandrels in connection with the herein-described formers and clamping jaws or arms; but in this case the formers and clamping-jaws are provided with an adjusting means.-

By removing the boxes or bearings a and a and replacing them by suitable boxes which fit the mandrel of smaller diameter, and in order that the present formers and clampingarms will be suitable to such smaller mandrel, I secure within the curved recesses c of the arms e, by means of bolts, blocks .9, which conform with the proper diameter of the mandrel upon which the smaller size of pipe is to be formed. In the same manner the clamping-arms are provided with similar blocks 3 and 5 as will be seen from Fig. 13. The operation of the machine in forming this pipe will be precisely the same as that described in connection with Figs. 1, 2, the.

In making pipes of very small diameters it maybe necessary to Widen the depressor II. This is accomplished, as will be seen from Figs. 14: and 15, by attaching to said bar, by bolts, blocks 2?, which are connected by a bar t, which operates upon the end g of the metal sheet, instead of the edge It, as in the construction described in the above.

It will be understood that many variations of construction and arrangements of the various parts herein described may be made without departing from the scope of my invention. Hence I do not wish to be limited to the exact form of mechanism shown and described. For instance, the formers and clamping-arms can each be arrangedon and worked by means of separate shafts and the machine still be operative. and other changes may be made in other parts of the mechanism of the machine.

Having thus described my invention, what I claim is 1. In a machine for forming leader-pipes, the combination of a mandrel removably arranged in bearings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping or holding jaws on either side of said mandrel, said formers and clamping or holding jaws being arranged on the same shaft, arranged in the same vertical plane, passing through the central axis of the mandrel, but each being independent in its action from the other, said formers being keyed to said shaft and operated thereby,

while said clamping or holding jaws rotate loosely on the same shaft, said clamping or holding jaws being provided with handles for forcing them against the sheet metal being formed on the mandrel, and a bending-down device to close the joint in the leader-pipe, all of the operations of said forming, clamping, and bending-down devices following consecutively without removing the metal sheet from the machine, for the purposes set forth.

2. In a machine for forming leader-pipes, the combination of a mandrel removably arranged in bearings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping or holding jaws on either side of said mandrel,a depressor-bar working in slots in said formers provided with means for depressing the same, said formers and clamping or holding jaws being arranged on the same shaft but each being independent in its action from the other, and a bending-down device to close the joint of the leader, all of the operations of said forming, clamping, depressing, and bendingdown devices following consecutively without removing the metal sheet from the machine, for the purposes set forth.

3. In a machine for forming leader-pipes, the combination of a mandrel provided with a slot extending longitudinally therein, into which the sheet metal is inserted and said mandrel being removably arranged in bear ings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping or holding jaws on either side of said mandrel, said formers and clamping or holding jaws being arranged on the same shaft,arranged in the same vertical plane, passing through the central axis of the mandrel, but each being independent in its action from' the other, said formers being keyed to said shaft and operated thereby, while said clamping or holding jaws rotate loosely on the same shaft, said clamping or holding jaws being provided with handles for forcing them against the sheet metal being formed on the mandrel, and a bending-down device to close the joint of the leader-pipe,

ICC

all of the operations of said forming, clamping, and bending-down devices following con secutivel-y without removing the metal sheet from the machine, for the purposes set forth.

4:. In a machine for forming leader-pipes, the combination of a mandrel provided with 'a longitudinal slot into which the sheet metal is inserted and said mandrel being removably arranged in bearings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping or holding jaws on either side of said mandrel, said formers and clamping or holding jaws being arranged 011 the same shaft, arranged in the same vertical plane, passing through the central axis of the mandrel, but each being independent in its action from the other, said formers being keyed to said shaft and operated thereby, while said clamping or holding jaws rotate loosely on the same shaft, said clamping or holding jaws being provided with handles for forcing them against the sheet metal being formed on the mandrel, a bending-down device to close the joint in the leader-pipe, all of the operations of said forming, clamping, and bending-down devices following consecutively without removing the metal sheet from the machine, means for turning said mandrel in its bearings, and a holding or locking device for locking the mandrel in the desired position, for the purposes set forth.

5. In a machine for forming leader-pipes, the combination of a mandrel provided with a longitudinal slot intowhich the sheet metal is inserted and said mandrel being removably arranged in hearings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping or holding jaws on either side of said mandrel, said formers and clamping or holding jaws being arranged on the same shaft, arranged in the same vertical plane, passing through the central axis of the mandrel, but each being independent in its action from the other, said formers being keyed to said shaft and operated thereby, while said clamping or holding jaws rotate loosely on the same shaft, said clamping or holding jaws being provided with handles for forcing them against the sheet metal being formed on the mandrel, a bending-down device to close the joint of the leader-pipe, all the operations of said forming, clamping, and bending-down devices following consecutively without removing the metal sheet from the machine, means for turning said mandrel in the bearings, and a holding or locking device for locking the mandrel in the desired position, and means on the shaft upon which the formers and clamping devices are arranged, engaging with a handle or lever on said shaft for looking or holding the same in the desired position, for the purposes set forth. 7 g

6. In a machine for forming leader-pipes, the combination, with a slotted mandrel provided with a locking mechanism on one end thereof consisting, essentially, of a slotted wheel and a toothed lever pivoted to one of the 1nandrehsupports, of formers secured to ing portions to which is secured a depressorbar adapted to force the sheet metal down upon the mandrel, as and for the purposes set forth.

7. In a machine for forming leader-pipes, the combination, with a slotted mandrel, of formers secured to a shaft provided with means for rotating the same, said formers having upwardly-projecting portions to which is secured a depressor-bar by means of pins or bolts working in slots in said bar, and a handle pivoted between two of said formerarms to operate said bar, whereby the latter receives a downwardly-inclined movement, for the purposes set forth.

8. In a machine for forming leader-pipes, the combination, with a slotted mandrel, of formers secured to a shaft provided with means for rotating the same, said formers having upwardly-projecting portions to which is secured a depressor-bar by means of pins or bolts working in slots in said bar, and a handle pivoted between two of said formerarms to operate said bar, whereby the latter receives a downwardly-inclined movement, and means on said handle on the former bearing-shaft for locking the same in the desired position, for the purposes set forth.

9. In a machine for forming leader-pipes, the combination, with a slotted mandrel loosely turning in hearings and adapted to'be removed therefrom, and a shaft arranged in the same vertical plane passing through the central axis of the mandrel and permanently secured in the supports of the machine, of forming and clamping devices on said shaft, each working independent of the other and each constructed and arranged to form the sheet metal around the mandrel and hold the same thereon and cause the edges of said metal to interlock, said formers being keyed to said shaft and operated thereby, while said clamping or holding jaws rotate loosely on the same shaft, said clamping or holding jaws being provided with handles for forcing them against the sheet metal being formed on the mandrel,and abending-down device arranged and working on a rack in the machine directly above the mandrel, said device being adapted to move along said rack and engage with the seam formed in the leader-pipe, whereby said seam is closed down, for the purposes set forth.

10. In a machine for forming leader-pipes, the combination, with a slotted mandrel ar ranged in bearings in the supports of the machine, a cross-bar A connecting said supports and formers and clamping or holding devices, and'a depressor-bar secured to said formers for forming the leader-pipes around the mandrel and causing the edges of the sheet metal to interlock, of means constructed and 7 arranged to be moved along the rack on said cross-bar and engage with the seam formed in the pipe,whereby said seam is tightly closed down, for the purposes set forth.

11. In a machine for forming leader-pipes, the combination of a mandrel arranged in bearings in the supports of the machine, formers for bending the metal sheet around the mandrel, clamping-jaws on either side of said mandrel, a depressor-bar working in slots in said formers and provided with means for depressing the same, said formers and clampingjaws being arranged on the same shaft, and a slotted wheel on said mandrel, and a toothed lever pivotally attached on one of said supports adapted to engage with said wheel to hold the slotted mandrel in its normal and inoperative position, as and for the purposes set forth. I

12. In a machine for forming leader-pipes, the combination, with the mandrel B, of shaft D, formers E, and a lever for operating said shaft provided with a spring-actuated and pivoted arm, one end of which passes through a perforation in said lever and is adapted to engage with a hole in a plate adjustably secured in a support on one of the machinesupports, for the purposes set forth 13. In a machine for forming leader-pipes, the combination, with mandrel B, shaft D, formers E, and a lever d for operating shaft D, and a spring-actuated arm pivotally se cured to said lever d, of a plate (1 adjustably secured by means of bolts in slots in a support (Z and the end at of the arm on lever (1 being adapted to engage with a perforation in said plate d", for the purposes set forth.

14:. In a machine for forming leader-pipes, the combination, with the mandrel B and shaft D, of formers E, consisting of arms 6, secured on said shaft, provided with recessed portions 6, adapted to embrace the mandrel,said arms 6 being provided at their upper ends with an adjustable depressor-bar, and means secured between two of said arms 6 on a connectingpiece for adjusting said depressor-bar as and for the purposes set forth.

15. In a machine for forming leader-pipes, the combination of a mandrel, with formers, holding or clamping jaws, and a depressorbar adjustable in relation to each other to form the sheet metal around the mandrel, and curved plates adapted to be secured within the curved portions of the said formers, and clamping-jaws, whereby they are made to fit a variety of such mandrels, for the purposes set forth.

16. The herein-described machine for formin g leader-pipes, consisting, essentially, of two supports A and A, provided with heads a and a, having removable bearings therein, a recessed or slotted mandrel removably arranged in said bearings, a slotted wheel secured on said mandrel in looking engagement with a toothed lever pivoted on said support A, and a handle on said mandrel for operating the same when said toothed lever has been released from the holding engagement with said slotted wheel, a shaft B, supported in bearings in said frame-supportsA and A, operated by means of a handle, and means thereon for locking said shaft in the desired position, formers keyed on said shaft, and two sets of clamping arms or jaws loosely arranged on said shaft, but operating independently by means of handles, a depressor-bar H, secured to said formers, as set forth, all of the operations of said formers, clamping-arms, and depressor following consecutively and bending the sheet metal into form and interlocking the edges and forming a seam, a cross-bar A connecting supports a and a on the framesA and A, respectively, said bar being provided on opposite sides with ways or guides and on its under side with a rack, and a bending-down device sliding on said ways, being provided with gear mechanism for operatingapinion in engagement with the teeth on said rack and having a wheel operated by spring-actuated lever to cause the same to be depressed upon the seam of the pipe and rotate thereon as said bending-down device moves forward on the cross-bar A whereby said seam is firmly closed down, and a support or gallows A at one end of the machine, provided with a pin A for the insertion of a wedge between said pin and the mandrel, whereby the latter can be held in an inclined position for the removal of the completed leader-pipe from the raised end of the mandrel, as and for the purposes set forth.

17. In a machine for forming leader-pipes, the combination, with the mandrel B and shaft D, of formers E, consisting of arms 6, secured on said shaft and provided with recessed portions e, adapted to embrace the mandrel, said arms 12 being provided with an adjustable depressor-bar, and arms F, loosely arranged on said shaft D and connected bya barf and handles f for operating the same and causing the curved ends of the arms F to clamp the sheet metal on the mandrel, for the purposes set forth.

18. In a machine for forming leader-pipes, the combination, with the mandrel B and shaft D, of formers E, consisting of arms 6, secured on said shaft and provided with the recessed portions 6, adapted to embrace the mandrel, said arms a being provided with an adjustable depressor-bar, and a clamping device F, comprising therein arms f loosely arranged on said shaft D and connected by means of a bar f provided with levers or handles f, as set forth.

19. The combination, in a machine for forming leader-pipes, with the mandrelB and the shaft D, of a clamping device F, comprising therein arms f loosely arranged on the said shaft and connected by means of abar f provided with handles or levers f said handles being in close sliding con-tact with standards or frames I, provided with a pin i,whereby the levers and the clamping device can be held in a desired position, as and for the purposes set forth.

20. The herein-described machine for formingleader-pipes, consisting, essentially, of two supports A and A, provided with heads a and a,having removable bearings therein, a recessed orslotted mandrel removably arranged in said bearings, a slotted wheel secured on said mandrel in locked engagement with a toothed lever pivoted on said support A, and ahandle on said mandrel for operating the same when said toothed lever has been released from its holding engagement with said slotted wheel, a shaft D, supported in permanent hearings in said frame-supports A and A, operated by means of a handle, and means thereon for locking said shaft in a desired position, formers keyed to said shaft, and two sets of clamping arms or jaws loosely arranged 011 said shaft, but operating independeutly by means of handles, a depressor-bar Ii, secured to said formers, as set forth, all of the operation of said formers, clamping-arms, and depressor following consecutively and bending the sheet metal into form and interlocking the edges and forming a seam, a crossbar A connecting supports a and a on the frames A and A, respectively, said bar being provided on opposite sides with ways or guides and on its under side with a rack, and a bending-down device sliding on said ways, being provided with gear mechanism for operating a pinion in engagement with the teeth on said rack and having a wheel operated by a spring-actuated lever to cause the same to be depressed upon the scam in the pipes and rotate thereon as said bending-clown device moves forward on the crossbar A whereby said seam is firmly closed down, as and for the purposes set forth.

21. In a machine for forming leader-pipes, the combination, with a mandrel adapted to rotate in bearings and upon which the leaderpipe is formed, its supports, and the crossbeam A provided with ways or guides on opposite sides and a rack on its under side, of a bending-down device adapted to slide on said ways and provided with a depressible seam-closing wheel, as and for the purposes set forth.

22; In a machine for forming leader-pipes, the combination, with the mandrel l3, the cross-beam A provided with ways or guides on opposite sides and a rack on its under side, of a bending-down device consisting of plates Z and Z, secured to the guides by plates 1 a pinion m on one of said plates operated by a hand-wheel it, said pinion engaging with a gear-wheel m on a spindle m provided with a pinion m meshing with the teeth of the rack, arms m and m on said spindle provided with a seaming-wheel 0', having a groove in its circumference, and a spring-actuated handle 1], secured to one of said arms for depressingsaid seaming-wheel upon the 111- terloeked edges of the sheet-metal pipe and firmly closing the seam, as and for the purposes set forth 23. In a machine for forming leader-pipes, in combination with a mandrel adapted to rotate in bearings and upon which the leaderpipe is formed, its supports, and the formerarms e, a plate 8, secured in the curved recess c of each arm by means of a bolt, as and for the purposes set forth.

24. In a machine for forming leadenpipes, the combination, with a mandrel and a shaft D, of formers provided with a depressor-bar H, a bar t, secured thereto by means of blocks i, said formers consisting of arms e, to which said depressor-bar is adj ustably secured, and means connected with said depressor-bar for adjusting the same, as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereunto set myhand this 13th day of December, 1890.

' SIMEON HARTLEY.

Witnesses:

WV. P. MELIcK, FREDK. O. FRAENTZEL. 

